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LTC4088-1 PDF预览

LTC4088-1

更新时间： 2024-02-02 01:26:35
品牌 Logo 应用领域
凌特 - Linear 电池
页数 文件大小 规格书
24页 303K
描述
High Effi ciency Battery Charger/USB Power Manager with Regulated Output Voltage

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中文翻译

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LTC4088-1 数据手册

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LTC4088-1/LTC4088-2  
High Efficiency Battery  
Charger/USB Power Manager  
with Regulated Output Voltage  
U
FEATURES  
DESCRIPTIO  
The LTC®4088-1/LTC4088-2 is a high efficiency USB  
PowerPathTM controller and Li-Ion/Polymer battery  
charger. It includes a synchronous switching input regu-  
lator, a full-featured battery charger and an ideal diode.  
Designed specifically for USB applications, the  
LTC4088-1/LTC4088-2’s switching regulator auto-  
matically limits its input current to either 100mA, 500mA  
or 1A via logic control. The LTC4088-1 powers-up with the  
charger off; the LTC4088-2 powers-up with the charger on.  
n
Switching Regulator Makes Optimal Use of Limited  
Power Available from USB Port to Charge Battery  
and Power Application  
180mΩ Internal Ideal Diode Plus External Ideal Diode  
Controller Seamlessly Provide Low Loss Power Path  
When Input Power is Limited or Unavailable  
Automatic Charge Current Reduction Maintains  
n
n
3.6V Minimum V  
Full Featured Li-Ion/Polymer Battery Charger  
OUT  
n
n
V
Operating Range: 4.25V to 5.5V (7V Absolute  
BUS  
The switching input stage provides power to V  
where  
OUT  
Maximum—Transient)  
power sharing between the application circuit and the  
n
n
n
n
n
1.2A Maximum Input Current Limit  
battery charger is managed. Charge current is automati-  
1.5A Maximum Charge Current with Thermal Limiting  
cally reduced to maintain a regulated 3.6V V  
during  
OUT  
Bat-TrackTM Adaptive Output Control  
low-battery conditions. As the battery is charged, V  
OUT  
Slew Control Reduces Switching EMI  
Low Profile (0.75mm)14-Lead 4mm× 3mm DFN Package  
tracks V  
for high efficiency charging. This feature al-  
BAT  
lows the LTC4088-1/LTC4088-2 to provide more power to  
the application and eases thermal issues in constrained  
applications.  
U
APPLICATIO S  
n
Media Players  
An ideal diode ensures that system power is available  
from the battery when the input current limit is reached  
or if the USB or wall supply is removed.  
n
Digital Cameras  
n
GPS  
PDAs  
Smart Phones  
n
The LTC4088-1/LTC4088-2 is available in the low profile  
14-Lead 4mm × 3mm × 0.75mm DFN surface mount  
package.  
n
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
PowerPath and Bat-Track are trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6522118  
U
TYPICAL APPLICATIO  
Switching Regulator Efficiency to  
System Load (P /P  
)
OUT BUS  
High Efficiency Battery Charger/USB Power Manager  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
3.3µH  
WALL  
SYSTEM  
LOAD  
USB  
V
D0  
D1  
D2  
SW  
V
OUT  
V
OUTS  
GATE  
BAT = 4.2V  
BUS  
10µF  
BAT = 3.3V  
LTC4088-1/LTC4088-2  
CHRG  
BAT  
CLPROG  
PROG C/X GND NTC  
10µF  
+
8.2Ω  
0.1µF  
Li-Ion  
V
I
= 5V  
BUS  
= 0mA  
2.94k  
499Ω  
BAT  
408812 TA01a  
10x MODE  
0
0.01  
0.1  
(A)  
1
I
408812 TA01b  
OUT  
40881fb  
1
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中文翻译

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